sporty girl poses in sports top with starting number in studio with white background

competition background sportswear schoolgirl athletics hairstyle sportsbra sportstop undefined starting training isolated athletic clothing longhair marathon ponytail teenager teenage abdomen athlete fitness jogging smiling sporty sports number studio pretty posing briefs jogger muscle runner poses white black adult belly blond happy sport thigh youth girl slim pink hair limb neck teen wear top arm fun gym joy starting-number competition